Article ID Journal Published Year Pages File Type
8154365 Journal of Magnetism and Magnetic Materials 2017 5 Pages PDF
Abstract
Emerging structure and magnetic properties of Al3+-modified SrFe12O19 M-type hexaferrite system (SrAlxFe12−xO19) had been studied in detail via doping engineering. With Al3+ ion nominal content ranging from 0 to 4 (0≤x≤4), the lattice parameters decrease due to the substitution of Fe3+ ions by smaller Al3+ ions, and the magnetization shows a continuous reduction with the increasing of Al content. For the coercivity, its value initially increases, reaching a maximum value of 16,876.9 Oe at x=3, and then reduces with the Al content further increase. When all the Fe3+ ions (x=4) are replaced by Al3+ ions, the net magnetic moment will be closed to zero, that will weaken the exchange interaction between Fe3+ ions, resulting in decrease of coercivity sharply and transformation ferrimagnetism into antiferromagnetism. The mechanism of the improvement of the magnetic properties induced by Al doping is discussed in the present work.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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